Micromachined low-finesse Fabry-Perot interferometer for the measurement of DC and AC electrical currents

• Type: Article in International Scientific Journal
• Date: 2003

Authors

Heredero, RL (Author) Other; Santos, JL (Author) FCUP; de Caleya, RF (Author) Other; Guerrero, H (Author) Other

Journal

Title: IEEE Sensors Journal

Vol. 3

Pages: 13-18

ISSN: 1530-437X

Publisher: IEEE

Indexing

ISI Web of Knowledge - 12 Citations

Scopus - 16 Citations

Scientific classification

FOS: Engineering and technology > Electrical engineering, Electronic engineering, Information engineering

Other information

Authenticus ID: P-000-HVZ

DOI: 10.1109/jsen.2003.810112

Abstract (EN): A micromachined low finesse Fabry-Perot interferometer for measuring dc and ac electrical current is presented. Interrogation of the microcavity is achieved by a dual-wavelength fiber Bragg grating technique working in quadrature. A linear relation between the dc electrical current and the optical phase defined by the microcavity was detected. Large enhancement of the sensitivity of the microcavities is presented with the use of a planar coil instead of a power line. The sensitivity of the sensor with the planar coil configuration is 7.9 rad/A and resolution of similar to0.18 mA/rootHz is achieved when the distance between the planar coil and the transducer head is 2 mm. The response of the sensor for ac measurements is 0.14 V/A with a resolution of 6 mA/rootHz when the distance between the power line and the transducer head is 5.5 cm.

Language: English

Type (Professor's evaluation): Scientific